<!DOCTYPE html>
）<html lang="zh-CN">
<head>
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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }

        body {
            color: #333;
            line-height: 1.6;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
            min-height: 100vh;
            background: linear-gradient(135deg, #1a2a6c, #2a5298);
        }

        #particles-js {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: -1;
        }

        .container {
            max-width: 800px;
            margin: 40px auto;
            background: rgba(255, 255, 255, 0.85);
            border-radius: 18px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            padding: 40px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        header {
            margin-bottom: 30px;
            padding-bottom: 20px;
        }

        .error-code {
            font-size: 6rem;
            font-weight: 700;
            color: #e74c3c;
            margin: 20px 0;
            text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.1);
        }

        h1 {
            font-size: 2rem;
            color: #2c3e50;
            margin-bottom: 20px;
        }

        .subtitle {
            font-size: 1.2rem;
            color: #7f8c8d;
            margin-bottom: 30px;
        }

        .content {
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .content p {
            margin-bottom: 20px;
            text-align: center;
        }

        .btn {
            display: inline-block;
            background: #3498db;
            color: white;
            text-decoration: none;
            padding: 12px 30px;
            border-radius: 8px;
            font-weight: 500;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            margin: 10px;
        }

        .btn:hover {
            background: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .btn-secondary {
            background: #95a5a6;
        }

        .btn-secondary:hover {
            background: #7f8c8d;
        }

        .astronaut {
            width: 150px;
            height: 150px;
            margin: 0 auto 30px;
            position: relative;
            animation: float 3s ease-in-out infinite;
        }

        .astronaut-body {
            width: 80px;
            height: 80px;
            background: white;
            border-radius: 50%;
            margin: 0 auto;
            position: relative;
            border: 2px solid #ddd;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }

        .astronaut-helmet {
            width: 60px;
            height: 60px;
            background: #3498db;
            border-radius: 50%;
            position: absolute;
            top: -20px;
            left: 10px;
            border: 2px solid #ddd;
        }

        .astronaut-visorglass {
            width: 30px;
            height: 20px;
            background: #aed6f1;
            border-radius: 10px;
            position: absolute;
            top: 15px;
            left: 15px;
        }

        .astronaut-backpack {
            width: 40px;
            height: 60px;
            background: #7f8c8d;
            border-radius: 10px;
            position: absolute;
            top: 20px;
            left: -45px;
        }

        @keyframes float {
            0% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-20px);
            }
            100% {
                transform: translateY(0px);
            }
        }

        footer {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #eee;
            color: #7f8c8d;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .container {
                margin: 20px auto;
                padding: 20px;
            }
            
            .error-code {
                font-size: 4rem;
            }
            
            h1 {
                font-size: 1.5rem;
            }
        }
    </style>
</head>
<body>
    <!-- 背景粒子效果 -->
    <div id="particles-js"></div>

    <div class="container">
        <header>
            <div class="astronaut">
                <div class="astronaut-backpack"></div>
                <div class="astronaut-body">
                    <div class="astronaut-helmet">
                        <div class="astronaut-visorglass"></div>
                    </div>
                </div>
            </div>
            <div class="error-code">404</div>
            <h1>页面未找到</h1>
            <p class="subtitle">抱歉，您访问的页面似乎迷失在太空中了</p>
        </header>

        <div class="content">
            <p>
                您正在寻找的页面可能已被移除、更改名称或暂时不可用。
                不过，这并不意味着您的探索之旅结束，您可以返回主页继续浏览其他内容。
            </p>
        </div>

        <div class="actions">
            <a href="javascript:history.back()" class="btn">返回首页</a>
            <a href="javascript:history.back()" class="btn btn-secondary">返回上页</a>
        </div>

        <footer>
            <p>&copy; 2025 个人网站. 保留所有权利.</p>
        </footer>
    </div>

    <!-- 粒子背景效果脚本 -->
    <script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script>
    <script>
        // 初始化粒子背景
        if (typeof particlesJS !== 'undefined') {
            particlesJS('particles-js', {
                particles: {
                    number: {
                        value: 100,
                        density: {
                            enable: true,
                            value_area: 800
                        }
                    },
                    color: {
                        value: '#ffffff'
                    },
                    shape: {
                        type: 'circle'
                    },
                    opacity: {
                        value: 0.5,
                        random: true
                    },
                    size: {
                        value: 3,
                        random: true
                    },
                    line_linked: {
                        enable: true,
                        distance: 150,
                        color: '#ffffff',
                        opacity: 0.4,
                        width: 1
                    },
                    move: {
                        enable: true,
                        speed: 2,
                        direction: 'none',
                        random: true,
                        straight: false,
                        out_mode: 'out',
                        bounce: false
                    }
                },
                interactivity: {
                    detect_on: 'canvas',
                    events: {
                        onhover: {
                            enable: true,
                            mode: 'grab'
                        },
                        onclick: {
                            enable: true,
                            mode: 'push'
                        },
                        resize: true
                    },
                    modes: {
                        grab: {
                            distance: 140,
                            line_linked: {
                                opacity: 1
                            }
                        },
                        push: {
                            particles_nb: 4
                        }
                    }
                },
                retina_detect: true
            });
        }
    </script>
</body>
</html>